Re: gst-devel - H.264 streaming: choppy video + timestamp warnings

[Thomaz Barros]

Hi everybody, As Adam I'm trying to develop a Gstreamer-basead application to
receive and send H.264 video over the internet and i had some problems
with packets being dropped too. I solved
that with these two pipelines.

Server:
#!/bin/sh
#
# A simple RTP server
#  sends the output of videotestsrc as h263+ encoded RTP on port 5000,
RTCP is sent on
#  port 5001. The destination is 127.0.0.1.
#  the video receiver RTCP reports are received on port 5005
#
# .-------.    .-------.    .-------.      .----------.     .-------.
# |vts    |    |h263enc|    |h263pay|      | rtpbin   |     |udpsink|  RTP
# |      src->sink    src->sink    src->send_rtp send_rtp->sink     | port=5000
# '-------'    '-------'    '-------'      |          |     '-------'
#                                          |          |
#                                          |          |     .-------.
#                                          |          |     |udpsink|  RTCP
#                                          |    send_rtcp->sink     | port=5001
#                           .-------.      |          |     '-------' sync=false
#                RTCP       |udpsrc |      |          |
async=false
#              port=5005    |     src->recv_rtcp      |
#                           '-------'      '----------'
#

# change this to send the RTP data and RTCP to another host
DEST=127.0.0.1

# tuning parameters to make the sender send the streams out of sync. Can be used
# ot test the client RTCP synchronisation.
#VOFFSET=900000000
VOFFSET=0
AOFFSET=0

# H264 encode from the source

#VELEM="videotestsrc is-live=1 pattern=1"
VELEM="v4l2src device=/dev/video0"

#VCAPS="video/x-raw-yuv,width=352,height=288,framerate=15/1"
VCAPS="ffmpegcolorspace"
VSOURCE="$VELEM ! $VCAPS"
#VENC="ffenc_h263p ! rtph263ppay"
VENC=" timeoverlay ! x264enc ! rtph264pay "

VRTPSINK="udpsink port=5000 host=$DEST ts-offset=$VOFFSET name=vrtpsink"
VRTCPSINK="udpsink port=5001 host=$DEST sync=false async=false name=vrtcpsink"
VRTCPSRC="udpsrc port=5005 name=vrtpsrc"

PIPELINE="gstrtpbin name=rtpbin
           $VSOURCE ! $VENC ! rtpbin.send_rtp_sink_2
             rtpbin.send_rtp_src_2 ! $VRTPSINK
             rtpbin.send_rtcp_src_2 ! $VRTCPSINK
           $VRTCPSRC ! rtpbin.recv_rtcp_sink_2"

echo $PIPELINE

gst-launch -v $PIPELINE



Client:
#!/bin/sh
#
# A simple RTP receiver
#

VIDEO_CAPS="application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)H264"

DEST=127.0.0.1

LATENCY=100

gst-launch -v gstrtpbin name=rtpbin latency=$LATENCY
                \
          udpsrc caps=$VIDEO_CAPS port=5000 ! rtpbin.recv_rtp_sink_0
                \
                rtpbin. ! rtph264depay ! h264parse  ! ffdec_h264 !
autovideosink                     \
          udpsrc port=5001 ! rtpbin.recv_rtcp_sink_0
                \
          rtpbin.send_rtcp_src_0 ! udpsink host=$DEST port=5005
sync=false async=false




Now the framerate is good but there are quite few delays between capture
and exhibition.
Could anybody help me?

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